package com.sky.service.impl;


import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Category;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper SetmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;


    /**
     * 新增菜品ji相关口味
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表dish插入1条数据
        dishMapper.insert(dish);
        //获取菜品的主键值
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            //向口味表dish_flavor插入n条
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //批量插入
            dishFlavorMapper.insertBatch(flavors);
        }
    }
    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());

    }

    /**
     * 菜品删除
     * @param ids
     * @return
     */
    @Transactional
    public void deleteBatch(List<Long> ids){
        ids.forEach(id ->{
            Dish dish =dishMapper.getById(id);
                //判断菜品是否为在售状态
                if (dish.getStatus() == StatusConstant.ENABLE)
                {
                    throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
                }

            });
        //判断该餐品是否被关联
        List<Long> setmealIds = SetmealDishMapper.getSetmealIdsByDishIds(ids);
    if (setmealIds != null && setmealIds.size()>0) {
       throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
       }
    //删除菜品表中的数据
            ids.forEach(id ->{
                dishMapper.deleteById(id);
                dishFlavorMapper.deleteByDishId(id);

            });
            }

    /**
     * 通过id查询菜品及其口味
     * @param id
     * @return
     */
    public DishVO getByIdwithFlavor(Long id){
        Dish dish=dishMapper.getById(id);
        List<DishFlavor> dishFlavorList=dishFlavorMapper.getByDishId(id);
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavorList);
        return dishVO;
    }


    /**
     * 根据id修改菜品
     * @param dishDTO
     * @return
     */
     @Transactional
    public void updateWithFlavor(DishDTO dishDTO){
         Dish dish =new Dish();
         BeanUtils.copyProperties(dishDTO,dish);
         //更新dish表中的数据
         dishMapper.update(dish);

         //删除菜品的口味信息
         dishFlavorMapper.deleteByDishId(dishDTO.getId());
         List<DishFlavor> flavors=dishDTO.getFlavors();
         if (flavors !=null && flavors.size()>0){
             flavors.forEach(dishFlavor -> {
                 dishFlavor.setDishId(dishDTO.getId());
             });
             dishFlavorMapper.insertBatch(flavors);

         }
     }

    /**
     * 启售、禁售菜品
     * @param status
     * @param id
     * @return
     */

    public void startOrStop(Integer status, Long id) {
       Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                .build();
        dishMapper.update(dish);
    }


    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }






}












